Research And Realization Of Hospital Information System Base On C/S Frame Of Tri-tier

As the development of information technology and more and more requirement for medical care, hospital informationization became a matter of great urgency. Currently, in many large and medium-sized hospitals, Hospital Information Systems had been built and improved. On the other hand, small and medium-size hospitals were behindhand on this area. Lack of financing was the main cause of this kind of hospitals. In addition, business of these hospitals changed frequently. It was a necessary for them to adjust to the business, so it was a need for the high extensibility of the system.The purposes of this project were to meet the requirements of these small and medium-size hospitals. That was decreasing the development and maintaining cost and enhancing the extensibility. The HIS was functioned by using the C/S frame of tri-tier based on COM+ component. Business logic was stored separately on the application tier not Client or Database to realize code reusability. Meanwhile, in order to enhance the extensibility of the application tier, various Enterprise Objects were divided and packed with COM+ components.Firstly, in this paper, some basic concepts about HIS were expounded, as well as the background, the contents and the significance of this research. Next, the development environment, development tools of foreground and background were introduced. Considering the feature and actual requirement, the common function and design principle of this HIS were proposed, followed by the main frame of HIS.Secondly, in the part of system design, Database designs were firstly introduced, including its concept and logical structure. Secondly, the design of Application Server is explained. Three processes of this Application Server included research of module, compartmentalization of logic relation, and conformation of environment. Various Enterprise Objects were established based on method of component. And system security was discussed in the end.Application Server was the key issue of the development of HIS with tri-tier C/S frame. In this paper, a special technology, combination of MIDAS and COM+, was applied to realize Application Server. When MIDAS was used, complexity of development for the application system was reduced and efficiency was improved. The realization of components using MIDAS and COM+ was explained in detail in the paper. Finally, the realization of HIS with the C/S frame of tri-tier based on COM+ component was introduced in instance of Clinic charge subsystem and Clinic dispensary subsystem.Clear levels and independence modularization made HIS easy to extend, maintenance and applicability.This system was in stable operation and good function, which made the efficiency greatly raised and the intensity of labor decreased, at the same time standardized the process of hospital work.